Nonsoiling plaster backing and method of making it



Sept. 13, 1-932. e. s. MATHEY ET AL 39771344 NONSOILING PLASTER BACKING AND METHQD OF MAKING IT Filed Dec. 17. 1929 Eli; Q:

gwuewtw G. 51. VIQTHQY LIE: "LEL TT ER Patented Sept. .13, 1932 gunman stares @lUfiTAVE S. M'ATHEY AND CHARLES IE. SLOTTEB, OF NEW BRUNSWICK, NEW JERSEY,

Parent orator,

ASSIGNORS TOVJOI-INSON & JOHNSON, OF NEW BRUNSWICK, NEW JERSEY, A GOR- EOEATION OF JERSEY NONSOILING PLASTER BACKING AND METHOD OF MAKING IT Application filed December 17, 1929. Serial No. 414,808.

The object is to provide for plasters having non-soiling backings.

Heretofore, and before our invention, it has been the practice in the manufacture of plaster to spread adhesive mass on a cotton or other fabric of close construction. The cotton or other fabric, notwithstanding singeing and sizing or other usual finish, has innumerable fibers protruding from the threads and making for a pile, nap, or fuzzy surface. This fuzzy character of the backing is conducive to ready soiling in the necessary handling of the plaster; and it suffers the further disadvantage that when the plaster is rolled upon itself on a spool or mandrel the adhesive mass contacts the fuzzy backing and when subsequently unrolled the effect is to pull up more fibers and so make for additional soiling.

The nature of, our invention consists in filming, glazing or enameling the backing in such way as to obviate the exposure or presence of loose fibers and for the purpose and with the result of providing a. non-soiling backing.

In the annexed drawing Figure 1 is a-view of a form of usual backing presenting the problem, namely the fuzzy surface making for soiling.

Fig. 2 shows the same embodying the present invention.

Fig. 3 shows a view of a more or less open fabric embodying the invention.

Fig. l is a sectional view of a plaster embodying the invention.

Referring to Fig. 1, the element 5 is the usual close Woven cotton or other fabric which has been singed and or sized or other wise treated in the usual way of finishing such fabric, but-which, nevertheless, presents when closely examined a highly developed pile, nap or fuzzy surface 6 due to the innumerable fibers protruding from the threads, which characteristic, as stated at the outset, is decidedly objectionable because it 7 makes for ready soiling of the backing.

According to the present invention, we meet this problem b filming, glazing or enameling the usual nished surface of the 0 backing in such way as to obviate the exposure of fuzzy or other surfaces making for soil.- mg. Such film, glaze or enamel may take the form of an almost imperceptible continuous water repellant film having the capacity to lay all loose or upstanding fibers and to render the material non-soiling. Such form is well adapted for close structures. For more or less open weaves or structures, it is sometimes advantageous to embed the fabric in the filming material. In any event the rough side of the fabric is beneficial to the spreading of the plaster or adhesive mass.

In the achievement of our purpose we have had marked success with theuse of various types of lacquers of cellulose acetate or nitrocellulose base, or viscose solutions. The viscosity of the solution may vary according to the thread count and the amount of film to through it. After the filming, the fabric may be passed over warm drums of smooth surface to eliminate the solvent and forcalendering and finishing if desired. Usually we employ a transparent, opaque or colorless film, but it would be a mere continuation of our inventive thought to color it.

Fig. 2 shows our non-soiling film 7 applied to the finished side of a plaster backing 8. Fig. 3 shows a more or less open Woven backing 9 embedded in non-soiling film 10. In Fig. 4, 11 represents the non-soiling film and 12 represents the plaster or adhesive mass. Having described our invention, we claim: 1. In the manufacture of plaster of the character set forth, the method which consists in singeing one surface of the foundation fabric and then applying to that surface a film of cellulose acetate for the purpose and with the result of laying the fuzz or fiberdown and to present a water-re ellent, nonsoiling, non-sticking, smoothnished surface, and applying adhesive mass to the other or rough side of the fabric, said film being essentially su erficial as to depth so as not to impair the exible or pliable properties of the fabric.

ric whereof one side is singed and filmed with cellulose acetate to cover any attendant fuzz,

and whereof the other side is relatively rough and covered with adhesive mass.

In testimony whereof we aflix our signatures. v v

GUSTAV'E S. MATHEY. CHARLES F. SLOTTEB. 

